John edwin dennis



patented July 19, 1927.

PATENT OFFICE.

JOHN EDWIN DENNIS, OF LONDON, ONTARIO, CANADA.

SLIDING METAL WINDOW.

Application filed December 6, 1926. Serial No. 152,991.

The principal objects of the invention are to provide a, metal window structure par ticularly adapted for railway coaches which will effectively prevent the ingress of dust and. cinders and will prevent drafts and will also prevent heat rad ation retaining a warm inner surface.

A further inuportant object is to provide a structure in which the sash will slide freely.

The principal feature of the invention consists in the novel construction of the sash from a pair of moulded sheet metal strips whereby shouldered recesses are provided. to

retain the glass and a double weatheringliange engages in sliding contact with the inner and outer faces of a rectangular shape-d rib formed in the frame.

In the accompanying drawings, Figure l is a small perspective view of a windmv frame and sash shown partly in horizontal section.

l igure 2 is an enlarged broken vertical mid-section of the frame and sash.

Figure 3 is a horizontal section through the line 3-3 of Figure 2.

.In the construction shown, the frame which is formed of a sheet metal strip is formed with a pair of rectangular shaped ribs 1 which are spaced apart and extend inwardly from the sill 2 and sides 3.

Each sash t is formed of a pair of sheet metal strips each of which. has an outer flange 5, a shoulder 6, a portion 7, a shoulder S and an inner flange 9. A spacing strip 10, preferably of an insulating material such felt is arranged between the inner flanges 9 and said flanges are secured by suitable rivets or screws or if a metal spacing strip is used the flanges and strip may be secured together by spot welding same.

The glass sheets 11 and 12 are placed inside the inner shoulders 8 and may be beded in felt or in a suitable cement if desired. Flat metal strips 13 are placed within the outer shoulders 6 and abutting the face of the portion 7 are secured by suitable screws and overlapping the glass sheets hold them securely in place.

The outer flanges 5 are parallel to each other and overlap the parallel side faces of the rectangular shaped ribs 1. It will be readily understood that as the strips form ing the sash are secured. together at the inner flanges thereof, the outer flanges may be set to engage the frame ribs in a spring contact, consequently a very tight joint may be obtained so that a practically air tight joint will be obtained and dust and cinders cannot get through.

A single or double glass may be used in each sash as desired and when the double glass is used it will be seen that a dead air space is enclosed between the two sheets. Such construction is very desirable for railway coach windows and a very effective insulation from the outside cold is effected.

The use of an insulating spacer strip 10 also reduced the actual conduction of heat between the inner and outer sides of the sashl Each side of the frame structure is provided with a longitudinal U-shaped strip 1- of sheet metal which is arranged between the ribs 1, the side faces of said strip being parallel and spaced from the side faces of the ribs so as to form narrow longitudinal slots .15 in which the flanges 5 operate.

Strips 16 and 17 are arranged at the in ward and outward sides of the vertical ribs to form the slots l8 in which the outward flanges 5 of the sash slide. The strip 16 is here shown formed with a vertical groove 19 to accommodate a sliding blind if desired.

The upper ends of the sash extend into a box casing 20 forming part of the frame and a separating strip QLU-shaped in cross section and secured to the upper ends of the U strips le'l extends across the frame and forms a seal for the upper ends of the sash.

The drawings illustrate the application of this invention to a double window but it must be understood that the invention is applicable for use in single windows as well and where single windows are used itwill be seen that the double glazing is very effective in providing a dead air space between the two sheets of glass which will prevent direct conduction of heat.

that I claim as my invention is:

1. In a sliding metal window, the combination with a frame having an inwardly projecting rib, of a sash formed of a pair of metal strips having inner parallel flanges secured together and outer flanges spaced apart in parallel oifset relation to said inner parallel flanges and forming shoulders therebetween, said outer flanges engaging the sides of said frame ribs in sliding contact, and a glass beded in the shoulder between the ofi'set flanges.

2. In a sliding metal window, the combination with a frame having an inwardly projecting rib, of a sash formed of a pan of metal strips each formed with a double shoulder and inward and outward parallel flanges, the inward flanges being secured together and the outward fianges being spaced to receive said frame rib and to engage the sides thereof in sliding contact, a sheet of glass beded in the inner shoulder, and a fastening strip beded in the outer shoulder and overlapping the edge of the glass.

3. In a sliding metal window, the combination with a frame having an inwardly projecting rib, of a sash formed of a pair of shouldered metal strips having inner parallel flanges, a spacing strip secured between aid-flanges, a glass beded against said inn r flange, a fastening strip arranged outside of said shoulder and securing said glass in place, said sash strips each having parallel outer flanges engaging the sides of said ribs in sliding contact.

4. In a sliding metal window, the combination with a frame having an inwardly I projecting rib, of a sash formed of a pair of shouldered metalstrips having inner parallel flanges, a spacing strip of insulating material secured between said flanges, a glass beded against said inner flange, a fastening strip arranged outside of said shoulder and securing said glass in placefsaid sash strips each having parallel outer flanges engaging the sides of said ribs in sliding contact.

5. In a sliding metal window, a sheet metal frame having a pair of inwardly projecting ribs each formed with parallel side faces, a pair of sash each formed of a pair of moulded sheetnietal strips having their free edges arranged in the form of parallel flanges engaging the parallel faces of said ribs in sliding contact, said strips being shouldered inwardly and having inward parallel flanged edges secured together, glass sheets beded in the shouldered portion of said strips, and fastening strips secured to the shouldered portion of said sash and securing the glass sheets in place.

) (3. In a sliding metal window, a sheet' metal frame havmg a pair of inwardly projecting ribs formed therein and spaced apart, each of said ribs having parallelside faces, a U-shaped metal strip arranged between the aforesaid strip having parallel side faces spaced from the adjacent faces of said ribs, sash each formed of a pair of shoulder-ed sheet metal strips having the outward parallelly flanged edges spaced apart to engage the parallel faces of said ribs and the interposed U-shaped strip, said sash strips being secured together at their inward edges,and sheets of glass secured in JOHN EDWIN DENNIS. 

